The B1321 code on your 2020 Chrysler Pacifica indicates a fault in the front right (passenger) power seat motor circuit. This code affects your Pacifica's passenger seat adjustment system, signaling an electrical or mechanical issue with one of the seat motors.
Understanding B1321 on Chrysler Pacifica
Code B1321 is the passenger side counterpart to B1320. The body control module monitors seat motor operation and sets this code when abnormal current draw, no response, or feedback issues are detected in the passenger seat circuit.
Common Symptoms
- Passenger seat won't adjust
- One adjustment direction doesn't work
- Seat moves but gets stuck
- Switch feels like it does nothing
- Motor sounds but seat doesn't move
- Easy-entry feature not working
Primary Causes
- Seat motor worn out or failed
- Seat adjustment switch failure
- Wiring damage from items under seat
- Seat track jammed or binding
- Connector corrosion
- Seat module malfunction
- Motor gear/transmission failure
Diagnostic Procedure for 2020 Pacifica
Using Stellantis scan tool, access passenger seat module data. Test each adjustment function - fore/aft, recline, height. Listen for motor operation when switches are activated. Check wiring under passenger seat for damage. Inspect seat track mechanism. Check for loose or corroded connectors at seat motors.
Repair Solutions
Replace failed motor(s) after identifying which one is faulty. Remove obstructions from seat track and lubricate. Repair damaged wiring under seat. Replace faulty adjustment switch if it's not sending commands. Clear codes and verify all passenger seat adjustments function properly.